/in/foo.cc: In function 'int main()':
/in/foo.cc:24:103: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   24 |     for(int idx=(int)order.size()-1; idx>=0; idx--){ int u=order[idx]; for(auto&e: rg[u]) if(d2[u]>=0 && d2[e.to]<0 || (d2[u]>=0 && d2[e.to] < d2[u]+e.w && false)) {} }